1G4 THE EOYAL INSTITUTION. [CHAP. III. 



moreland. He was apprenticed to a medical man in 

 the country and graduated as a physician in Edinburgh 

 in 1788. Dr. Brown at that time was teaching his 

 new theory of medicine, and Dr. Grarnett became a 

 strong Brunonian. In an inaugural essay on Health, 

 which was published ultimately, he showed with great 

 clearness how the doctrine of accumulated and ex- 

 hausted excitability could be applied to explain the 

 movements in the body in health and disease. 



He left Edinburgh to study medicine in London, 

 and in 1790 he went to Bradford to practise his 

 profession ; there he gave some private lessons in 

 natural philosophy and chemistry. 



In 1791, when twenty-five, he thought he should 

 succeed better by practising at Knaresborough in the 

 winter and at Harrogate in the summer. He analysed 

 the waters at Harrogate, and in 1794 he built a house 

 there and determined to practise only at Harrogate. 

 An engagement to be married made him form a new 

 plan for success. He persuaded his intended wife 

 reluctantly to agree to emigrate to America after their 

 marriage, which took place in the following year. 

 Then he sold his house in Harrogate and purchased 

 apparatus for lectures on natural philosophy and 

 chemistry. On their way to America they went to 

 Liverpool. There, whilst waiting for a ship, he was 

 persuaded to give a course of lectures. This was 

 successful, and he was invited to give the same course 

 on chemistry and experimental philosophy at Man- 

 chester. He was still more successful, and invitations 

 came to him from Warrington, Lancaster, Birmingham, 



